Pressure-induced phase transition of micelle-forming thermoresponsive PMMA-b-PNIPAM diblock copolymers in aqueous solutions
We wish to investigate the pressure-dependent behavior of micelle-forming PMMA-b-PNIPAM diblock copolymers in aqueous solution. Their structural changes upon crossing the coexistence line in the (p,T)-frame shall be studied by varying pressure at constant temperature. SANS at D11 will give insight into the degree of dehydration at the phase transition, which is different at low and at high pressures. Time-resolved SANS after a rapid pressure jump shall give insight into the kinetics of the phase transition (collapse and aggregation), spanning from 100 ms to few 1000 s and over a large range of length scales (~1-100 nm). These measurements extend our previous results on aqueous PNIPAM homopolymer solutions.
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PAPADAKIS Christine; Leonardo Chiappisi; HUANG Shu Hsien; KO Chia-Hsin; Geethu P. Meledam and SCHULTE Alfons. (2019). Pressure-induced phase transition of micelle-forming thermoresponsive PMMA-b-PNIPAM diblock copolymers in aqueous solutions. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.9-10-1577
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